Packing for piston-rods



(No Model.)

J, A. OSGOOD.

PACKING POR PISTON RODS. No. 274,365. Patented Mar.20,1883. y

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UNITED STATES PATENT @Erica JQSIAH A. OSGOOD, OF BOSTON, MASSACHUSETTS.

PACKING FOR PISTON-RODS.

. SPECIFICATION forming part of Letters Patent No, 274,365, dated March20, 1883,

Application filed January 12, 1883. (No model.)

To all whom 'it'may concern:

Be it known that I, JosIAn A. Oscoop, ofl Boston, county of Suffolk,State ot' Massai convenience and even danger.- For example,

after a hammer has been standing still for a short time water willcollect in the cylinder, which, when the hammer is again to be set inoperation, often passes through the packing and along the piston-rod',andV in dropping upon the heated iron which is being operated upon bythe hammer causes great annoyance and even danger to the Workman. Theescape of Water from a. cylinder of theair-pumpof an air-brake apparatusfor railway trains is often troublesome, especially in cold Weather,when it may freeze and thus interfere seriously with the operation ofthe pump.

My present invention consists iii the combination, with the usualpacking or stuiiing box and rod packed therein, cfa water-removingdevice, such as hereinafter described, to remove the Water from the saidrod, and means to convey the Water thus removed to a Vplace Where it maybe discharged Without inconvenience or damage. The `said water-removfing device consists of one or more rings encircling the rod and pressedagainst its sides, they accompanying the rod in its lateral vibrationsrelative to the packing-box or cylinderhead orother partition throughwhich it passes, the said ringsbeing connected with the stuft'- ing orpacking lbox in such a manner as not to accompany the rod in itsreciprocating movement. The said ring or rings thus operate to scrapethe Water from the sides of the rod, it being easier for the water toflow over the face of the ring than between the ring land the rod. Thewater thus removed .from the sides of the rod is received in a chamberor reservoir, from which it may be led by a suitable pipe to any desiredpoint.

The water-reservoir is shown in cneinstance of'iny invention asconsisting of an annular chamber surrounding and having an opening forthe passage of the rod, oi' considerably greater diameter than the saidrod, so as to permit the said lateral vibrations of the rod withoutContact between it and the sides of the said reservoir, which isprovided with a seat transverse to the said rod to receive the side ofthe Water-removing rings surrounding the said rod and pressed closelyagainst it the said rings being dividedly transversely, and the portionspressed against the sides of the rod by a suitable spring. By thisarrangement the water removing or scraping ring is held sufficientlyclose upon the rod to entirely prevent the passage of water between itand the said rod, the said Water being diverted over the outside oi' thesaid ring, from which it passes into the reservoir and is conveyed awayby a suitable eduction-pipe.

In another embodiment of myinvention the Water-receivin g chamber ismade in the scraping-ring itself, tbc bottom ofthe chamber beinginclined so that the Water iiovvs toward one side thereof, from which itis discharged into a receptacle provided with an eduction-pipe. Thisconstruction is especially convenient when the water-removing device isto be applied to an air-brake apparatus Without altering itsconstruction or taking it apart.

Figure l shows in longitudinal section a sufiicient portion of acylinder-head, packing-boxj and piston-rod provided with awater-removing device for preventing the passage of Water ofcondensation along the rod in accordance with this invention, it beingshown as applied to an airbrake apparatus; Fig. 2, a plan view of thewater-removing ring detached; Fig. 3,

i The piston rod a, and cylinder b, With its stuiing-box or packing c,may beof anyr usual construction, the said packing being herein shownIDO as having a plane bearing, 2, and curved bearing 3, to accommodatethe lateral and angular deviation of the rod, the said packing, however,constituting no part ofthe present invention. At the outside of theopening in the packing or stufin g boX through which the rod a passesthe said rod is provided with a waterremoving device consisting of aring, d, made in two portions, (shown in Fig-3 as having portions d'overlapping one another so as to break the joint between them, as bestshown in Fig. 3,) one of the said portions beingprovided with a pin,d2,'entering a socketin the overlapping part of the other portion of thering, thus hinging the two together, they being placed around the rodand pressed against its sides by a spring, e, (shown in Fig. 3 as aspiral spring,) resting in a groove in the lower portion ofthe ring,which is preferably of smaller diameter than the upper portion thereof.The ring is supported just at the end of the packing-box, preferably byspringsf, connected with the spring e and with eyes It, formed in awire, h', twisted around the stuffing-box, the whole thus being easilyattached without any alteration in the said stuing-box.

The ring pressed against the sides of the rod will scrape oft' ordeflect the water issuing from the stufngbox and iiowing along the rod,the said water turning oft' over the surface of the ring adjacent to thestuffing-box, and, as shown in Figs. 1,2, and 3, the said ring isrecessed or provided with a chamber, i, to receive the water thusremoved from the rod. The bottom of the said chamber is inclined, itbeing lowest adjacent to the point where the ends of the ring notconnected by the pin d2 meet and overlap, so that the water naturallyiiows to-Y ward this point, whereit is discharged through the space 4,between the upper portion of the two members of the ring. In order toconvey the water thus discharged away from the stuifin g-box B of theair-cylinder beneath, the said boxB is provided with a receptacle, lc,partially embracing the rod and fitted to the space between the box Band ring d, and having feet k', which enter the wrench-sockets 5 of thestuiing-box, or may be properly located to enter holes bored t-o receivethem in the upper part of the stuffing-box B. The said receptacle isprovided with an eduction-pipe, m, by which' the water is conveyed toany desired point, and the water thus collected at a single point flowsaway with sufficient rapidity not to freeze, as it would do ifdistributed in small drops over the surface of the box B.

1n the apparatus shown in Fig. 4 the chamj ber i', which receives thewater, is independent of the rings by which the water is removed fromthe rod, thev said chamber being connected with the stuffing-box bymeans ofsuitable lugs, a, and bolts or screws, and being annular inshape,as shown, its inner wallforming a passage through which the rod cpasses, and being of sufficient size to accommodate the lateraldeviations of the said rod. The said inner wall is provided at its upperend with a seat, 6, to receive the scraping-rings d3 d4, (shown as twoin number,) each being divided to enableit to be placed around the roda, and the two rings being so located as to have the uncut portion ofone opposed to the cut portion of the other to break the joint, in theusual manner. rlhe said 'rings d3 d4 are shown as having their innerfaces lined with soft or anti-friction metal r, and they are providedwith grooves 7 at their periphery to receive springs c', by-which theyare pressed tightly against the roda, so as, to prevent the passage ofwater between them and the said rod; A follower, t, is interposedbetween the rings d3 d4 and, the end of the stufng-box or cylinder-head,as shown, it being provided with springs u, tending-to press it againstthe said rings, and the latter upon the seat 6 on the reservoir/i. Bythis arrangement the rin gs d d4 readily accompany the lrod c in all itslateral movements, they then sliding on the seat 6, and thus alwaysmaintain a tightjoint between their interior surfaces and the outersurfaces of the said rod, so that water passing along the rod will b'edeliected over the tops of the said rings and will pass into reservoiri', which is provided with 'an eduction-pipe, m', by which the water isconveyed away to any desired point, it never accumulating to any greatextent in the said reservoir.

It will be seen that the efficiency of the herein-described device forremoving water doesrnot so much depend upon the absolute tightness ofthe joint between the rod and the rings d d3 d4 or between the latterand the reservoir t' as upon the fact that a much freer passage isafforded for the liquid over the outside of the rin gsfand then awayfrom the chamber than through the said joints, and that, al though it isdifficult to prevent the passage of the water from the cylinder byactual tightness yof packing when pressure is brought to bear, theherein-described apparatus enables the said water to be conveyed away,so that it will produce no inconvenience. The chamber surrounding therod serves to receive tho water from the sides of the rod and the ringsand convey or guide it into the eduction-passage.

I claiml 1. In a packing for reciprocating rods, the combination, with astuffing-box containing packing, of the water-removing ring outside ofthe said box, pressed against the sides of the rod and movable laterallytherewith, and the chamber to receive and discharge the wa- IOS .IIC

ter collected from the rod, substantially as described.

- 2, The reservoir fixed relative tov the rod and provided with a seatsurrounding the said rod, combined with the water-removing yring held inclose contact with the rod and movable laterally therewith upon the saidseat, substantially as described.

3. The cylinder-head and stuffing-box containing packing, and thereservoir provided @emes Y A g with an outlet-passage, xed thereonoutside In testimony whereof I have signed my name of Iche said box andsurrounding the reciproto this specification iu the presence of twosuboating rod, combined with Water removing seribing witnesses.

rings held in Contact with the said rod, and ai JOSIAH A. OSGOOD. 5follower en d springs whereby they are pressed Witnesses:

against a seat iu the seid reservoir, as and for Jos. P. LIVERMORE,

the purposedesorbed. BERNICE J NOYES.

